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I have received this error on a port listened to by a Squid server. Is this warning issued prior to reaching the point where pending TCP requests would have been dropped? And if that point is reached, would the counter for tcpListenDropQ0 shown in netstat be greater than 0? Mine is at 0. Thanks.

-- - Kyle

Source is Usenet: comp.unix.solaris

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15/05/2018 14:54 - Kyle Tucker wrote: Hi Kyle It sounds like maybe the box is getting hammered - Is it really busy? There are steps you can take to tune the stack on Solaris boxes, you can make changes to set numerous variables in order to increase throughput.

Below is a script I use when setting up web servers (Sol 10) which seems to increase throughput - YMMV of course, and I wouldn't blindly apply the script, take some time to work through it and identify if it would be useful to you. Some features may not work on older Solaris versions, again YMMV.

http://docs.sun.com/app/docs?q=tunable+parameters+solaris is very useful.

15/05/2018 14:54 - In article <4P8ig.14582$qD.954@newsfe1-gui.ntli.net>, Sam N <sun@unix.ms.nospam> writes: Right, and then I'd have thought netstat would have showed tcpListenDropQ0 > 0. The box had not been rebooted between the message and when I ran netstat. Maybe I'll set up a test box with a very low setting and see if I can get the error generated and get tcpListenDropQ0 incremented. Thanks.

/dev/tcp tcp_conn_req_max_q0 - unestablished connection queue (incomplete handshake) /dev/tcp tcp_conn_req_max_q - established connection queue Are two parameters that you can tune in order to increase the queue sizes.

http://www.informit.com/articles/article.asp?p=101138&seqNum=5&rl=1 has more info - it seems to be a pretty good article.

cheers Sam

Source is Usenet: comp.unix.solaris

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15/05/2018 14:54 - Sam N <sun@unix.ms.nospam> wrote: I don't know how busy that particular box was at the time (no sar) and it's at a customer site, but will watch it more closely in the future.

[ script snipped ] This looks very helpful.

Yes, I read a good amount on docs.sun.com and Google groups when this occured. But I can't find a definitive answer to what actually occurs, if anything, when the error is issued and what increments the above counters in netstat. Any idea? Thanks.